Loan Calculator
A loan is a contract between a borrower and a lender in which the borrower receives an amount of money (principal) that they are obligated to pay back in the future. Most loans can be categorized into one of three categories:
Amortized Loan: Paying Back a Fixed Amount Periodically
Use this calculator for basic calculations of common loan types such as mortgages, auto loans, student loans, or personal loans.
| Loan Amount |
$
|
| Loan Term |
years
months
|
| Interest Rate |
%
|
| Compound | |
| Pay Back | |
Results:
| Payment Every Month | $0.00 |
| Total of 0 Payments | $0.00 |
| Total Interest | $0.00 |
|
Principal
Interest
|
|
Deferred Payment Loan: Paying Back a Lump Sum Due at Maturity
| Loan Amount |
$
|
| Loan Term |
years
months
|
| Interest Rate |
%
|
| Compound | |
Results:
| Amount Due at Loan Maturity | $0.00 |
| Total Interest | $0.00 |
|
Principal
Interest
|
|
Bond: Paying Back a Predetermined Amount Due at Loan Maturity
Use this calculator to compute the initial value of a bond/loan based on a predetermined face value to be paid back at bond/loan maturity.
| Predetermined Due Amount |
$
|
| Loan Term |
years
months
|
| Interest Rate |
%
|
| Compound | |
Results:
| Amount Received When the Loan Starts | $0.00 |
| Total Interest | $0.00 |
|
Principal
Interest
|
|
Loan Calculator
A Loan Calculator helps you estimate monthly payments, total interest, and overall loan costs for different types of loans, including:
- Amortized Loans (fixed payments over time, like mortgages or car loans)
- Deferred Payment Loans (lump-sum repayment at maturity)
- Bonds (fixed-income investments with yield calculations)
Why Use a Loan Calculator?
✅ Plan Borrowing – See how much you’ll pay monthly and in total.
✅ Compare Loans – Adjust terms, rates, and compounding frequencies.
✅ Avoid Surprises – Understand interest costs before committing.
✅ Financial Clarity – Make informed decisions on loans and investments.
Whether you’re budgeting for a mortgage, personal loan, or bond investment, a loan calculator ensures you borrow smarter.
Amortized Loan: Fixed Amount Paid Periodically
Many consumer loans fall into the category of amortized loans, where borrowers make regular payments consisting of both principal and interest. These payments are spread uniformly over the lifetime of the loan until it’s fully paid off at maturity. Common examples include mortgages, auto loans, student loans, and personal loans.
In everyday conversation, the term “loan” usually refers to this type. It’s a reliable structure that helps borrowers manage debt with predictable monthly payments.
Deferred Payment Loan: Lump Sum Due at Maturity
This type of loan is common in commercial or short-term lending. Unlike amortized loans, deferred payment loans require a single lump-sum payment of both principal and interest at the end of the term.
Though some variations like balloon loans may have small interim payments, this format only calculates loans that require a one-time full repayment upon maturity.
Bond: Predetermined Lump Sum Paid at Maturity
Bonds are a specialized form of loan, usually issued by corporations or governments. With bonds, the face value or par value is paid at maturity. This is predetermined and agreed upon when the bond is issued.
There are two primary types of bonds:
Coupon Bonds: These provide regular interest payments (annually or semi-annually), calculated as a percentage of the bond’s face value.
Zero-Coupon Bonds: These don’t pay interest during the bond’s life. Instead, they are sold at a discount and the full face value is repaid at maturity.
While bond values can fluctuate with market interest rates and economic conditions, the payout at maturity remains fixed—provided the issuer does not default.
Understanding Loan Components
Interest Rate
Interest is the cost of borrowing money. Most loans include an annual percentage rate (APR), which combines the base interest rate with any applicable fees. It’s important not to confuse APR with APY (Annual Percentage Yield), which applies to savings products.
Understanding how interest affects your loan helps you assess the true cost of borrowing.
Compounding Frequency
Compound interest is calculated not only on the principal but also on accumulated interest. The more frequent the compounding (e.g., monthly vs. annually), the higher the total interest paid. Most loans use monthly compounding.
Loan Term
The loan term is the duration over which the loan is repaid. Longer terms usually result in lower monthly payments, but higher overall interest. Shorter terms typically lead to higher payments, but less interest over time.
Consumer Loans: Secured vs. Unsecured
Secured Loans
Secured loans require the borrower to offer collateral, such as a car or home. If the borrower defaults, the lender has the legal right to seize the collateral. These loans are generally easier to get approved for and have lower interest rates.
Examples include mortgages and car loans.
Unsecured Loans
Unsecured loans do not require collateral. Instead, lenders evaluate the borrower’s financial credibility using the Five C’s of Credit:
Character – Credit history, income, and reputation
Capacity – Ability to repay (debt-to-income ratio)
Capital – Savings or other assets
Collateral – Not required, but sometimes evaluated
Conditions – Current economic and loan-specific factors
Unsecured loans often come with higher interest rates and stricter eligibility. If the borrower fails to repay, the lender may involve a collection agency.
Examples include personal loans, credit cards, and student loans.
Related Calculators:
Mortgage CalculatorExternal Resources:
Loan Calculator on Calculator.net
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